• always --enable-build-as-root (DP)
• remove CONFLICTS with lang/python3 (DP)
• remove future CONFLICTS with blas/lapack (PR 247542)
• add a pkg-message for SAGE_ROOT / SAGE_LOCAL (DP)
• remove the check of R´s Makevars.site (DP) see https://trac.sagemath.org/ticket/29943
• use math/e-antic from the ports tree
• make BROKEN on -CURRENT untill a solution is found / Python

Reported by: Dima Pasechnik <dimpase (at) gmail.com> (DP)